<template>
  <div ref="chartDom" style="height: 630px"></div>
</template>
<script>
import echarts from "echarts/lib/echarts";
import 'echarts/extension/bmap/bmap'
import debounce from "lodash/debounce";
import { addListener, removeListener } from "resize-detector";
export default {
  props: {
    option: {
      type: Object,
      default: () => {}
    }
  },
  watch: {
    option(val) {
      this.chart.setOption(val);
    }
  },
  created() {
    this.resize = debounce(this.resize, 300);
  },
  mounted() {
    this.renderChart();
    addListener(this.$refs.chartDom, this.resize);
  },
  beforeDestroy() {
    removeListener(this.$refs.chartDom, this.resize);
    this.chart.dispose();
    this.chart = null;
  },
  methods: {
    resize() {
      console.log("resize");
      this.chart.resize();
    },
    renderChart() {
      // 基于准备好的dom，初始化echarts实例
      this.chart = echarts.init(this.$refs.chartDom);
      if (this.option && typeof this.option === "object") {
        this.chart.setOption(this.option, true);
      }
    }
  }
};
</script>